Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Dr. Gerard Dennis Cerniak, MD

Individual provider Internal Medicine Physician · NPI 1003587049

Dr. Gerard Dennis Cerniak, MD is an Internal Medicine Physician in Joliet, Illinois. Practices as a sole proprietor. Licensed in Illinois.

Licensed in
IL
In the registry since
2021
Specialties on file
2
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Practice location Address checks out

208 Timberline Ct
Joliet, IL 60431-4852
Phone: (815) 744-7507
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Gastroenterology Physician (primary) Taxonomy 207RG0100X · Licence 36-46439 (IL)
Internal Medicine Physician Taxonomy 207R00000X · Licence 36-46439 (IL)

Record details

NPI number1003587049
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedSeptember 21, 2021
Last updated in NPPESDecember 15, 2021
Certification dateDecember 15, 2021
Mailing address208 Timberline Ct, Joliet, IL 60431-4852

Other providers in Joliet